Loom



Nov. 27, 1923 E. F DUNN LOOM Fild May 29, 1922 2 Sheets-Sheet 2 l atented Nov. 27, 1923.

EDMUND DUNN, 0F YONKEBS, NEW YORK, ASSEG-NOR TO ALEXANDER SMITH & SONS- 1,4?5,261 PTENT F ICE.

CARPET COMPANY, OF YONKERS, NEW YORK, A COREQBATION OF NEW YORK.

LOOM.

Application filed May 29,

To all whom it may concern:

Be it known that I, EDMUND F. DUNN, a citizen of the United States, residin at Yonkers, county of Westchester, and tate of New York, have invented certain new and useful Improvements in Looms, fully described and represented in the following specification and the accompanying drawings, forming part of the same.

This invention relates to improvements in looms.

It is the object of the present invention to provide an improved pawl shifting mechanism for power looms of that class in which the tuft spools are carried by a pair of chains or equivalent carrier, and in which the chains are arranged to be given a stepby-step movement to bring successive tuft spools into position for use, whereby the operator, when onone side of the loom, may control pawls on the opposite side thereof to reverse the chain shaft and bring one or more tuft spools into operative position a second or more times in case of a defect in weaving, or may start and stop the chains without reversing, as desired.

For a full understanding of the invention, a detailed description of the same will now be given in connection with the accompanying drawings and the novel features thereofthen be pointed out in the claims.

-While the accompanying drawings show only those portions of a loom necessary for an understanding of the present invention, a full showing of one type of loom designed for weaving Axminster or moquette carpets, and to which the device is especially applicable, is disclosed in United States Letters Patent No. 233,290, dated October 12, 1880, and No. 529,636, dated November 20, 1894, in which the tuft spools are successively removed from the chaincarriers for insertion of a row of tufts therefrom and thenreturned tothe carriers after such row has'b-een inserted, although the device obviously may be applied to other types of looms for weaving tufted fabrics. As the construction and operation of such looms are well understood, the'present improve ment will be described only so far as necessary in connection with the "accompany-- showing the chain shaft 1e22. Serial No. 564,337;

sprockets B over which pass chains C, which are given a step by step motion by ratchet mechanism hereinafter described to properly position the tuft spools D for use, such spools being removably mounted in carriages E secured to the chains C in a wellknown manner. The ratchet mechanism for imparting movement to the chains C, and by which the chains may be given either'a forward or backward movement, or stopped, consists in the present case of ratchets 10, 11 mounted on one end of the chain shaft A, the teeth of each ratchet wheel being oppositely disposed to those of the other wheel, so that when one or the other of the pawls 1, 2 are adjusted as hereinafter explained to engage either the ratchet 10 or 11 respectively, the chain shaft A will be given a forward or backward ste by step motion through cam lever 12 and link 13 connected to rocking lever 3 mounted on the shaft A. To-each' end of the rocking lever 3 is connected a lever 4 connected to arms 5 rigidly secured to pinions 6 in mesh with each other and mounted on a member G secured to the loom frame, so

thatas either the pawl 1 or 2 is set to en-' gage its ratchet 10 or 11, or when both pawls are so positioned as to beout of engagement with their ratchets, the motion imparted to therocking lever'3 willcontinue, and, dependent on the position of the slide frame 20, either fadvance, reverse or permit the chainshaft A to remain stationary. The means for bringing either pawl 1 or 2 into engagement with its ratchet 10 or 11, and

for keeping both of the pawls out of operative engagement with said ratchets, com

prise standards 14, 15 secured tothe loom frame at opposite sides thereof, in which are journ'aledthe ends of a shaft 17 arranged parallel to but vertically over chain shaft A. A pinion 18 secured to one end of shaft shaft will cease.

in any well known manner.

17 is arranged to, engage. a gear rack 19. formed on or secured to the top of a slide frame 20, such slide frame having depending arms 21, 22, preferably of arcuate form near their extremities and in which are formed arcuate slots 23 in which ride bowls 24 formed on the ends of the pawls 1, 2, the latter being pivoted to the rocking lever 3' 01 t e pposite end of shaft 17 is a lever 25 which, in the operation of the. device, is arranged to be set in any one of three positions by en: gagement with notches a, b, c in a segmental plate 26, whereby when the handle is turned shaft 17 will be revolved slightly and, through pinion 18 and rack 19, move slide frame 20 transversely. As the bowls of pawls 1, 2 ride up or down in slots23, each pawl: is swung on its pivot and their ratchet engaging ends either. brought into position for engagement withor disengagement from the ratchet with which it isintended to cooperate to either turn chain shaft A forward or backward. When the rack positionsvthe slide frame 20 so. as to keepv both pawls out ofengagementwith theratchets, movement of. the chain shaft A of course ceases. justment of lever in. the notches in segmental; plate, 26, and to. securely hold" such lever, in adjusted; position, shaft 17 is so mounted in. its bearingsin standards. 14,15

as to, have; a, slight longitudinal movement,

and a coil; spring, 27 mounted on such. shaft between central: bearing bracket 28 and ad justable. collar 29 constantly forces. such.

shaft and: therefore lever 25 to, the right in Fig. ,1 and, against segmental plate 26.

The operation of the device will be. clear from the foregoing, and. the. followingv brief statement: When handle) or. lever 52-5 is set in notch a the partswill be inthe positions shown in Fig- 4 and: the chain shaft A will, through engagement of pawl 1 with. ratchet 1.0, impart a forward step-by-step motion to such shaft by the mechanism above described for rocking the lever 3 towhich the pawls are pivoted, as above stated; I When the leverisin notch b, the parts will be in thepositions shown in Fig. 5 and the pawl bowl 24 will be so positionedin the. slots 23 asto throw theratchet-engaging; endsof the continuesto oscillate, movement: of the chain When the lever is setv in notch a, the slide frame will be in a position. opposite to that shown in- Fig lz and pawl- 2 will, therefore, be thrown intov engagement with its ratchet 11 while pawl l will/be held out' of engagement with its ratchet" and the chain shaft will be given; a

step-byrstep movement in a direction re verseto; that in which; it was turning when the lever was 1n notch: a, the lever belng- For permitting, ready ad-.

best form, it will be obvious that various changes and; modifications may be made therein to adapt it to looms of other types, while still retaining the invention defined Y by the claims.

lVhat is claimed. is

1'. The combination with, a. 100111 for weaving tufted fabrics in which the tuft spool, carriers are moved by an intermittently operated member, of a plurality of oppositely. toothed ratchets mounted; on said carrier-movingmember, a rocking. lever having pawls; pivotedthereto arranged to engage said ratchets, a slide frame'having means for swinging said pawls on their pivots to throw their ratchet-engaging ends into and out of engagement with said ratchets, and means. for moving said slide frame from the side of the loom,

2. Thecombination with a loom for weaving tufted fabrics. in which the tuft spool carriers are moved by an intermittently rotated shaft, of a plurality of. oppositely o5 a a 3. The combination witha loom for weaving tufted fabrics in which the tuft spool carriers, are moved by an intermittently rotated shaft, of av plurality of oppositely toothed ratchets. mounted on said. shaft, a rocking lever having a plurality of pawls pivoted thereto, a slide frame having depending arms, arcuate slots formed in said arms, bowls formed: on the pawls arranged to ride in said slots for. swinging said pawls l on their pivots to bring their ratchet-engaging ends lnto and out of operative engage. mentwithfsaid ratchets, and means operable from the opposite side of. the loom for controlling the movement of said slide frame.

4. The, combination with a loom, ofintermittentl rotated shaft A, oppositely toothed ratchets 10, 11 for actuating said shaft, a. rack, pawls- 1. 2- foropera-ting. said ratchets, slide frame 20 forthrowing said. pawls into and out of position to engage said ratchets, shaft 17 carrying pinion, 18 for engagement with rack 19, and handle 25 for turning said shaft to thereby control the movement. of

the slide frame.

with rack 19, handle 25 for turning said shaft to control movement of said slide frame, segmental plate 26, and spring 27 co- 1 operating with bracket 28 and collar 29 to hold said handle in frictional engagement With said plate.

In testimony whereof, I have hereunto set my hand.

. EDMUND F. DUNN. 

